Numerical investigation of influence on acceleration performance of MHD flow
1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China; 2. Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi′an, Shaanxi 710038, China
Abstract：The performance of MHD acceleration channel under different electrodes arrangement, intensity of applied magnetic field and channel expansion angle was numerically investigated. The results show that the outlet velocity and the maximum temperature inside the channel change slightly when the number of the electrodes is increased. The temperature inside the channel is decreased with the increasing of applied magnetic field intensity, and the outlet velocity is decreased when the magnetic field intensity is increased to 2 T. A greater expansion angle under constant applied potential can lead to decreasing in acceleration performance. Maintaining the total length of electrode, increasing the number of electrodes has slight effect on the acceleration performance of channel. Compared to the electrodes number, the external magnetic field intensity has greater impact on the acceleration performance. Therefore, by increasing the number of the external electrodes appropriately and setting reasonable magnetic field intensity， the best comprehensive performance of the acceleration channel can be obtained.
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2022, Vol. 43 
